Android (root): Even though you only pass through, you still spend plenty of time on your lock screen. It can help to ease some of the pains of visiting. That's where the LockScreen Tweakbox Xposed module comes in.

This module allows you to tweak a variety of little things on your lock screen. You can remove the limit for unlock attempts (if you happen to have a really difficult pattern), hide the label for your next alarm, or even make your phone scream if someone uses the wrong pattern. The latter, of course, is particularly useful if you have nosy friends who aren't terribly clever and scare easily.